def test_unit_system_id():
reg1 = UnitRegistry()
reg2 = UnitRegistry()
assert reg1.unit_system_id == reg2.unit_system_id
reg1.modify('g', 2.0)
assert reg1.unit_system_id != reg2.unit_system_id
reg1 = UnitRegistry()
reg1.add('dinosaurs', 12.0, dimensions.length)
assert reg1.unit_system_id != reg2.unit_system_id
reg1 = UnitRegistry()
reg1.remove('g')
assert reg1.unit_system_id != reg2.unit_system_id
reg1.add('g', 1.0e-3, dimensions.mass, prefixable=True)
assert reg1.unit_system_id == reg2.unit_system_id
def test_add_modify_error():
from unyt import m
ureg = UnitRegistry()
with pytest.raises(UnitParseError):
ureg.add('tayne', 1, length)
with pytest.raises(UnitParseError):
ureg.add('tayne', 'blah', length)
with pytest.raises(UnitParseError):
ureg.add('tayne', 1.0, length, offset=1)
with pytest.raises(UnitParseError):
ureg.add('tayne', 1.0, length, offset='blah')
ureg.add('tayne', 1.1, length)
with pytest.raises(SymbolNotFoundError):
ureg.remove('tayn')
with pytest.raises(SymbolNotFoundError):
ureg.modify('tayn', 1.2)
ureg.modify('tayne', 1.0 * m)
assert ureg['tayne'][:3] == ureg['m'][:3]
def test_add_modify_error():
from unyt import m
ureg = UnitRegistry()
with pytest.raises(UnitParseError):
ureg.add("tayne", 1, length)
with pytest.raises(UnitParseError):
ureg.add("tayne", "blah", length)
with pytest.raises(UnitParseError):
ureg.add("tayne", 1.0, length, offset=1)
with pytest.raises(UnitParseError):
ureg.add("tayne", 1.0, length, offset="blah")
ureg.add("tayne", 1.1, length)
with pytest.raises(SymbolNotFoundError):
ureg.remove("tayn")
with pytest.raises(SymbolNotFoundError):
ureg.modify("tayn", 1.2)
ureg.modify("tayne", 1.0 * m)
assert ureg["tayne"][:3] == ureg["m"][:3]
